Propagation of fractures due to high stress loads are a common cause of structural failure. This paper describes a thin soft elastomeric capacitor (SEC) sensor which can be adhered to structures to monitor strain fields and detect sub-millimeter deformations and fractures. Alterations in a mechanical structure change the geometry of the skin-like parallel plate capacitor sensor and the resulting capacitance change is measured as a change in the resonant frequency of a relaxation oscillator circuit. The sensor system comprising of the SEC sensor, the oscillator circuit and a microcontroller demonstrated its capability to detect millimeter scale stretches.
|Number of pages||4|
|Publication status||Published - 1 Jan 2016|
|Event||Eurosensors 2016 - 30th Anniversary Conference - Hungarian Academy of Sciences, Budapest, Hungary|
Duration: 4 Sep 2016 → 6 Sep 2016